How about five floors on both sides and three floors in the middle?

Not so good. This is a typical high on both sides and low in the middle. This pattern of feng shui is generally not good. The average house is high in the middle and low on both sides. This is called criminal clamping. Feng shui pays attention to hiding wind and gathering qi. Low in the middle and high on both sides. Only the airflow passes through the middle. The atmosphere of a natural house cannot be stable. So don't hide the wind and gather gas. So not good!